VISTEK V1626 digital to analogue
converter
8
Issue 1
When reference is given to the direction / position of switch settings, it assumes that the module is in the
vertical position as in the rack with its control panel on the left.
Switch
Setting
Function
SW1/1
Off
On
8 bit operation
10 bit operation
SW1/2
Off
On
Black clip enabled
Black clip disabled
SW1/3
Off
On
Not used
SW1/4
Off
On
VITC passed
VITC blanked
SW2
To the rear, a-b
To the front, b-c
Sub module output if fitted
YPbPr outputs from main board
SW3
To the rear, a-b
To the front, b-c
Sub module output if fitted
YPbPr outputs from main board
SW4
To the rear, a-b
To the front, b-c
Sub module output if fitted
YPbPr outputs from main board
SW5
Up, b-c
Down, a-b
Spare Y (N10) output
Spare re-clocked SDI output
SW6
Up, b-c
Down, a-b
Spare Pb (N10) output
Spare re-clocked SDI output
SW7
Up, b-c
Down, a-b
Spare Pr (N10) output
Spare re-clocked SDI output
The following potentiometers are calibrated at the factory before delivery, the unit will need to be re-calibrated
if the settings are altered (see calibration section).
Y,Pb,Pr DC offset adjustment.
VR1, VR4 and VR8 adjust DC offset of the Y, Pb and Pr channels respectively.
Y,Pb,Pr Gain Potentiometers
VR2, VR3, and VR6 adjust the gain of the Y, Pb, Pr channels respectively.
Deserialiser VCO centre frequency adjustment. (Test point TP4)
VR5 adjusts for centre frequency on TP4 the deserialiser PLL voltage test point.
Sync Amplitude Adjustment
VR7 adjusts output sync amplitude.
